xx31 xProofMultiplyingbothequationsbyxwegetthatx22x1x23x1Fortherstequationwehavex22x10andusingthequadraticequationgivesx2p 22411 212p 8 2Wecankeepitinthisformorrewritep ID: 361326
x;x=3+1 x:Proof.Multiplyingbothequationsbyx wegetthatx2=2x+1;x2=3x+1:Fortherstequation